Home Accessories Best Liquid Electrical Insulation

If you want to protect electric contacts and other electronic components most susceptible to external factors like water, high humidity, acidic, and alkaline electrolytes, you usually use unique insulating materials.Now, you can successfully replace commonly used electrical tape with liquid one.

It is preferable to get equipped with the best liquid electrical tape when it comes to hard-to-reach places. Premium tapes provide a high-quality protective layer, allowing you to insulate wires efficiently and effectively. Besides, they are also more convenient to apply to different surfaces. If you want to improve the quality of insulation, choose one of the top-5 liquid electrical tapes that I have collected for you to help you familiarize yourself with available options.

How to choose liquid electrical tape?

The market has tons of options of liquid electrical tape to choose from so that everyone can find the ideal one, depending on their needs. However, to make the best choice, I recommend you pay attention to the following features.

Liquid electrical tape

Color of liquid electrical tape

Liquid electrical tape comes in multiple colors, each serving as an indicator of the voltage level and phase.

That’s why it’s essential to pay attention to color when you purchase liquid wire insulation. For example, if you need to use it on the car’s highlights, you should choose a transparent color to not obscure the lighting. That said, there are many other colors available to meet different electrical needs. To learn the purpose of the color, you can find the respective information on the packaging of the tape or just use the following table.

Color Usage (U.S.)
Black Insulation Low voltage, phase A
Red Low voltage, phase B
Blue Low voltage, phase C
Brown High voltage, phase A
Orange High voltage, phase B
Yellow High voltage, phase C
Green Earth
Violet High voltage, phase B
White Low voltage, neutral
Grey High voltage, neutral

Сompatible materials with liquid electrical tape

As obvious as it might sound, the right decision is to choose the most versatile liquid electrical tape. How can you do it? First, pay attention to compatible materials. The best liquid electrical insulation will be compatible with most materials, including but not limited to plastic, rubber, metal, and more. So, you can apply it in many different situations.

Сuring time

Another essential thing is drying and curing time. To use liquid electrical tape efficiently, you should know how quickly the insulation dries. Most liquid electrical tapes dry in about 5 minutes and cure in 24 hours, the optimal time for comfortable work. If that’s the kind of performance you want, I recommend purchasing one of the following liquid tapes. I’ve tested them, and I can say that each of them has good drying and curing time.

Best Liquid Electrical Tapes Reviews

Star Brite 4 Ounce – best overall

Star Brite 4 Ounce

It is a versatile, high-performance product, providing long-lasting airtight, waterproof, and UV-resistant coating. This liquid insulation is compatible with many materials, such as metal, vinyl, rubber, plastic, etc. The coating dries in about 5 minutes and keeps flexibility after curing.

The temperature range is -50°F to +275°F. Different color options are available: you can find green, red, black, clear electrical tape. The price is about $14 for 4 oz.

The formula is based on vinyl, unlike many other liquid tapes with a rubber base. As a result, it’s flexible and doesn’t crack.

I have used it to repair damaged cables at home and fix the insulation on the wires in my car. It works well, the seal is flexible and reliable after curing. The brush on the cap helps apply the product and is convenient to use in difficult-to-reach places.

However, it’s pretty runny. So, some users may find it inconvenient to apply the product. One other slight issue you may face when using the product is that it tends to dry quickly after opening the can. That said, this problem can be fixed if you don’t wait too long.

If you’re going to try liquid insulation for the first time, this arguably one of the best liquid electrical tapes in Star Brite’s line is a great choice.

Key specs

  • Color: clear
  • Color (also available): black, green, red
  • Bottle volume: 4 oz /118 ml

Permatex 85120

Permatex 85120

This liquid tape provides a waterproof coating, protecting wires from moisture, dirt, and chemicals. It works on many surfaces, including vinyl, plastic, and metal. There’s a brush applicator in the cap for convenient usage. The formula dries not more than 5 minutes.

The Permatex liquid electrical tape is black, and it’s the only color option. I tested it with many wires and connections and can confidently say that the seal is very robust.

On the flip side of the coin, even more than the previous product. So, it can be messy. However, such consistency ensures that it dries extremely fast. And once you get the hang of it, it won’t be a problem.

If you’re looking for quick drying and reliable waterproof liquid wire insulation, Permatex is a perfect option for you.

Key specs

  • Color: black
  • Color (also available): –
  • Bottle volume: 4 oz /118 ml

Gardner Bender

Gardner Bender

This product offers a waterproof dielectric seal to protect wires from shortages, corrosion, chemicals, UV, and vibration. It works in the temperature range of -30 to 200 degrees F while keeping flexibility. Dries in 5–10 minutes and cures in 24 hours.

Multiple colors are available: green, black, red and white electrical tape. In addition, the base of the formula is rubber, unlike the previous two products. This makes it suitable both for indoor and outdoor use.

Gardner Bender doesn’t dry too quickly inside the can like vinyl-based formulas. However, compared with vinyl base, the properties of this rubber-based product are somewhat less durable, and the drying time is slightly longer. But still, it’s pretty good.

Works well and lasts long. The consistency is not too liquid, and it’s very easy to apply it.

Key specs

  • Color: green
  • Color (also available): black, red, white
  • Bottle volume: 4 oz /118 ml

Star Brite 1 Ounce Tube

Star Brite 1 Ounce Tube

This is Star Brite’s well-known formula in tube packaging. The volume is smaller. Color options are also different; liquid electrical tape is available in white, black, green, and red.

This vinyl-based tape is distinguished by a highly durable and long-lasting dielectric seal. The product can be used outside, under the ground, and in places exposed to water.

It’s excellent for waterproofing electrical cable connections on boats and other outside applications.

In my experience, applying this product from a tube is as convenient as from a can with a brush. It’s versatile, easy to use, and has a lot of applications in different conditions.

It’s a good option if you don’t want to buy a large quantity of the product. Maybe you’re just going to test it or use it several times. So, you don’t need a big can.

Key specs

  • Color: white
  • Color (also available): black, green, red
  • Bottle volume: 1 oz/28 g

Gardner Bender LTS-400 – best spray electrical tape

Gardner Bender

This liquid electrical tape comes in a spray. As a brand’s product in a can, this one is also rubber-based and helps protect wires from water, vibration, corrosion, and shortages.

It can be used indoors and outdoors, even in extreme conditions. The service range is -30 to 200 degrees F.

This is an excellent product to use in hard-to-reach places. It dries for 5 minutes, and you can apply multiple layers to create the coating thickness you need. However, many users don’t like a watery consistency because the layers are fragile, and it’s necessary to form too many layers to reach the required thickness.

If you’re looking for spray electrical tape, this is the best one!

Key specs

  • Color: black
  • Color (also available): –
  • Bottle volume: 6 oz/170 g

Buying guide

Uses for liquid electrical tape

The uses of liquid electrical tape include forming an insulation layer, joining connections, protection from corrosion, stabilizing components exposed to vibration. For example, you can use it for the following purposes:

For cars, motorcycles, and other vehicles
The liquid tape helps to repair window seals, cracked headlights, electrical installations, etc. If you are a driver, it’s a handy thing in your toolkit.

For boats
The liquid tape shows excellent performance in places exposed to water and moisture, such as boats. It helps to waterproof electrics and prevents corrosion, creating a hermetical coating.

For home electronics
Perhaps, there is insulation work in every home. You can use it to insulate electrical transformer contacts, repair damaged cables, restore gaps in the insulating coating on the wires, and protect your electronics and other gadgets.

Protection of outdoor electrics
Outdoor electrics are exposed to bad weather conditions, water, corrosion, dirt, dust, extreme temperatures, and many other factors. However, good liquid electrical tape is durable enough to resist all the negative impacts.

The liquid formula enables easy application and usage in tricky places. In addition, it is an excellent alternative to standard tape, which makes it worth being in your toolkit. So, if you have 5 minutes to dry an insulating layer, liquid electrical tape can be handy for you.

How to use liquid electrical insulation?

Do not forget to disconnect power before using liquid electrical insulation.

Can with brush applicator in the cap

  1. Stir well before use.
  2. Apply liquid tape to the needed area to coat it entirely for a dielectric seal.
  3. Let each layer dry for at least 10 minutes. Make as many layers as necessary. At least two are recommended.
  4. Close the can tightly.
  5. Do not use the repaired device for at least 4 hours.

Aerosol bottle

  1. Hold the bottle 12–16 inches from the surface and move it back and forth. Apply quite a bit of product.
  2. Let each layer dry for at least 30 minutes. Make as many layers as you wish. 3–4 are recommended.
  3. Allow at least 4 hours to dry before use.


How to remove liquid electrical tape?

The dried liquid insulation remains flexible and doesn’t come off no matter the environmental conditions.

There are no solvents that can remove the cured seal. That’s why you should cut it off if you need to remove it.

Cut a hole in the coating carefully through the covered surface of the repaired thing. Do not damage it, be very careful.

Remove significant parts of the seal. Then remove small remains from the small details of your device. You can use a craft knife to do this.

Then get out the most minor parts of the coating with a pair of tongs.

Is liquid electrical tape waterproof?

Liquid electrical tape is waterproof and weatherproof. It protects from moisture, chemicals, dust, abrasion, vibration, acid, and alkaline.

What is the liquid electrical tape drying time?

Liquid electrical tapes dry fast. Most of them dry in 5–10 minutes, and it takes about 24 hours to cure. Therefore, before applying another layer of coating, let the previous layer dry.

Is liquid tape better than electrical tape?

There are a lot of debates over whether the liquid tape is better than electrical tape. Some people say that liquid tape is more durable and lasts longer, while others say that electrical tape is more versatile and can be used for wider applications.

Liquid tape is an adhesive that is applied like paint. It’s made to be durable and resists damage, including water damage. Electrical tape, by contrast, isn’t made for durability; rather, it’s meant to insulate wires and electrical cords. But, of course, we all know how important insulation is when it comes to electricity!

Does liquid electrical tape harden?

Yes, the liquid tape does harden like liquid electrical tape. Since it dries and cures quickly, it hardens within a minute or two of application. The main component in the liquid tape is rubber; this means that the longer you wait to remove the liquid tape, the more difficult it will be to take off.

How long does liquid electrical tape last?

Liquid electrical tape typically lasts around three years. However, it will eventually degrade over time and lose its adhesive properties.

What is the flashpoint for liquid tape?

The flashpoint of liquid tape is approximately 300 degrees Fahrenheit. This means that it will ignite if it comes into contact with an open flame. For this reason, you should always take caution when using liquid tape and make sure to keep it away from any flames or heat sources.

Is liquid tape toxic?

Liquid tape is not toxic, but it can still cause skin irritation if you get it on your skin. Therefore, it is important to take precautions when using liquid tape and wear gloves to avoid accidentally touching the adhesive or inhaling the vapors of the burning hardeners used in the adhesive.

Is liquid electrical tape strong enough for ductwork?

Liquid electrical tape is not typically strong enough to be used for ductwork. While it can be used for light-duty applications, it is not a permanent adhesive. For more durable and long-lasting adhesives, you should consider duct tape or a sealant like silicone.

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